Safety-valve for locomotives.



. PATENTED JUNE 11, 1907. R. ANDERSON. SAFETY VALVE FOR LOCOMOTIVES.

APPLICATION FILED JAN. 31, 1907.

2 SHEETS-SHEET 1.

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WITNESSES:

A TTORNE VS PATENTED JUNE 11, 1907,

R. ANDERSON. SAFETY VALVE FOR LOCOMOTIVES.

APPLICATION FILED JAN. 31, i907.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

SAFETY-VALVE FOR LOCOMOTIVES.

Specification of Letters Patent.

Patented June 11, 1907.

Application fil d January 31,1907. Serial No. 365,121.

To a whom it may concern.-

Be'it known that I, For ANDERSON, a citizen of the United States, residing at Charleston, in the county of Ooles and State of Illinois, have invented a new and useful Safety-Valve for Locomotives, of which the following is a specification.

This invention relates to safety valves for the steam engines of locomotives and the like and has for its object to provide means for controlling the supply of steam from the boiler to the steam chests of the locomotive cylinders so that the steam may be quickly cut off from either one of the steam chests in case of accident or breakage to one of the steam chests or its associated parts thus permitting the locomotive to be operated from the opposite or intact steam chest and cylinder.

A further object of the invention is to provide a safety valve, the stem of which extends through the walls of the cylinder saddle at a point adjacent the steam chest so that the engineer or fireman may use the steam chest as a support while operating or adjusting the valve.

A further object is to form the walls of the steam port or passage with a recess or chamber adapted to receive the valve when the latter is moved to open position thereby to permit the free passage of steam from the boiler to the steam chest.

A still further object of the invention is to generallyimprove this class of devices so as to increase their utility, durability and e'flicieney.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, and illustrated in the accompanying drawings, it being understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims.

In the accompanying drawings forming a part of this specification: Figure 1 is a front elevation partly in section of a locomotive provided with a cut off valve constructed in accordance with my invention. Fig. 2 is a similar view showing one of the valves in closed position. Fig. 3 is a detail view of one of the valves. Fig. 4 is a transverse sectional view of the ring supporting collar.

Similar numerals of reference indicate cor responding parts in all of the figures of the drawings.

The improved valve is principally designed for use in connection with locomotives for cutting off the supply of steam from the boiler to one of the steam chests when the other steam chest or its associated parts becomes broken or otherwise disabled, and by way of illustration is shown in connection with a locomotive of the ordinary construction in which 5 designates the cylinder saddle, 6 the cylinders and 7 the steam chests. The cylinder saddle is formed with the usual intake ports or passages S which communicate with the steam chests 7 and also with the ex haust ports or passages 9 leading from the cylinders 6 to the extension of the boiler 10.

As both valves are substantially identical in construction and operation a detail description of one valve will suflice. Pivotally mounted at 10 within the intake port or passage 8 is a valve 11 having its lower face inclined or beveled at 12 for engagement with a correspondingly inclined valve-seat 13, there being an opening 14 formed in the side of the saddle 5 and communicating with the interior of the passage 8 for the reception of the valve when the latter is moved to open position, thus a'f'lording a free unobstructed passage for the steam from the boiler to the steam chest. The opening 14 is normally closed by a cap or cover 15 which is preferably riveted or otherwise rigidly secured to the saddle in any suitable manner, as by bolts 16, said cap being provided with a packing 17 and having its interior walls threaded for engagement with the valve stem 18. cured to the inner end of the valve stem is a sleeve or collar 19 provided with an annular groove 20 for the reception of a ring 21. The ring 21 is provided with oppositely disposed trunnions 22 to which are comiccted the adjacent ends of links 23, said links being pivotally connected at 24 to a pair of spaced ears or lugs 25 secured to or formed integral with the valve 11. It will thus be seen that by rotating the operating handle 26 the valve stem together with the collar may be moved transversely of the steam passage thereby to open and close the valve and thus control the supply of steam from the boiler to the steam chest.

The cap or closure 16 is provided with a seating recess 27 adapted to receive the col- Keyed or otherwise rigidly se lar 19 when the valve is moved to open position so that the latter will fit within the opening 14 and thus permit the free passage of steam in the port 8, as before mentioned. Seated in the reduced end of the cap or closure 15 is a gland 28 which surrounds the stem 18 and which in connection with the packing 17 forms an air and steam tight joint between the valve stem and cap. The operating handle 26 is pivotally connected to the valve stem 18, as indicated at 29 so that when the valve is moved to open position the operating handle 26 will drop to the position shown in Fig. 1 of the drawings so as not to engage the steam-chest. I

In operation should the cylinder, steam chest, pitman, crank pin or similar operating mechanism on one side of the engine become broken or out of order the steam from the boiler to said cylinder may be readily cut off by rotating the operating handle of the adjacent valve thus permitting the locomotive to be operated from the opposite or intact cylinder and steam chest. By positioning the cut ofi' valve in the cylinder saddle, said valve is readily accessible by either the engineer or fireman, the steam chest forming a support or platform for the engineer while operating the valve.

While it is preferred to use a pair of links for connecting the valve and valve stem it will of course be understood that a single link may be employed if desired.

From the foregoing description it is thought that the construction and operation of the device will be readily understood by those skilled in the art and further description thereof is deemed unnecessary.

Having thus described the invention what is claimed is:

1. In a locomotive, the combination with the steam chests, of a cylinder saddle having independent steam passages communicating with the steam chests, respectively, and a cut off valve extending through the walls of the saddle at each steam passage for controlling the supply of steam'to the steam-chests.

2. In a locomotive, the combination with the steam chest, of a cylinder saddle having a steam passage communicating with the steam chest, a valve mounted in the pas- 'sage for controlling the supply of steam to the steam chest, a stem extending through the walls of the saddle for moving the valve to operative and inoperative position and an operating member pivotally connected with the valve stem and supported in alinement with said valve stem when the valve is in closed position.

3. In a locomotive, the combination with the steam chest, of a saddle having a steam passage communicating with the steam chest, a valve pivotally mounted for swinging movement within the passage for controlling the supply of steam to the steam chest, a

valve stem extending through the walls of the saddle, and a pivotal connection between the valve and valve stem.

4. In a locomotive, the combination with the steam chest, of a cylinder saddle having a steam passage communicating with the steam chest there being an opening formed in the walls of the saddle at said-steam passage, a cap secured to the saddle and normally closing the opening, a valve arranged within the steam passage and seated within the opening when the valve is moved to open position, and a valve stem threaded in the cap and pivotally connected with the valve for moving the latter to open and closed position.

5. In a locomotive, the combination with the steam chest, of a cylinder saddle having a steam passage, there being an opening formed in the walls of the saddle and communicating with the steam passage, a cap secured to the saddle at said opening, a valve, a valve stem mounted for rotation in the cap, a collar secured to one end of the valve, and a link forming a pivotal connection between the collar and valve.

6. In a locomotive, the combination with the steam chest, of a cylinder saddle having a steam passage, there being an opening in the walls of the saddle and communicating with the steam passage, a cap secured to the saddle at said opening and provided with aseating recess, a valve stem threaded in the cap, a valve arranged within the steam passage, a collar secured to the inner end of the valve stem and adapted to enter the recess in the cap when the valve is moved to open position, and a pivotal connection between the collar and the valve.

7. In a locomotive, the combination with the steam chest, of a cylinder saddle having a steam passage, the interior walls of which are provided with a valve seat, a valve pivotally mounted within the passageand adapted to engage the valve seat, a valve stem extending through the walls of the saddle, and a pivotal connection between the valve and valve stem.

8. In a locomotive, the combination with the steam chest, of a cylinder saddle having a steam passage, the walls of which are provided with a valve seat, a valve pivotally mounted for swinging movement within the steam passage and adapted to engage the valve seat, a cap secured to the walls of the saddle and provided with a seating recess, a valve stem mounted for rotation in the cap, a collar secured to the inner end of the valve stem, a ring loosely mounted on the collar, and a pivotal connection between the ring and valve.

9. In a locomotive, the combination with the steam chest, of a cylinder saddle having a steam passage, the interior walls of which are provided with a valve seat, a valve pivotally mounted for swinging movement within the steam passage and adapted to engage said seat, avalve stem extending through the walls of the saddle and provided with a pivoted section, and a pivotal connection between the inner end of the valve stem and the valve.

10. In a locomotive, the combination with the steam chest, of a cylinder saddle having a steam passage, the interior walls of which are provided with a valve seat, there being an opening formed in the walls of the saddle and communicating with the passage, said opening being adapted to receive the valve when the latter is in open position, a cap secured to the saddle at said opening, a gland seated in one end of the cap, a valve stem threaded in the cap and extending through said gland, a

collar secured to the inner end of the valve stem, a ring loosely mounted on the collar and provided with oppositely disposed trunnions, links forming a pivotal connection between the trunnions and the valve, and an operating handle pivotally connected with the valve stem and movable into alinement with the valve stem when said valve is moved to closed position.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

ROY ANDERSON.

Witnesses:

WALTER CoNovER, MAGGIE ANDERSON. 

